Allow the PR repo to be controlled.

Author: desrosj

.github/workflows/backport.yml

@@ -4,33 +4,41 @@ on:
   workflow_dispatch:
     inputs:
       end_branch:
-        description: 'The branch to end at (e.g. 4.7). Defaults to the oldest branch receiving security updates.'
+        description: 'The branch to end at (e.g. 6.9). Defaults to the current supported branch.'
         required: false
         type: string
-        default: '4.7'
+        default: '7.0'
       pr-name:
-        description: 'The name for the pull requests. When provided, PRs are titled "<name> - <branch> branch".'
+        description: 'Pull request name (format is "<pr-name> - <branch> branch".'
         required: false
         type: string
         default: ''
       commit-sha:
-        description: 'The full length commit hash to cherry-pick. When provided, PR numbers are ignored.'
+        description: 'Full length commit hash to stage for backport.'
         required: false
         type: string
         default: ''
       pr_numbers:
-        description: 'Comma-separated PR numbers. Each PR is merged as a single commit using the PR title as the commit message. Ignored when a commit SHA is provided.'
+        description: 'Comma-separated PR numbers. Ignored when a SHA is provided.'
         required: false
         type: string
         default: ''
-      pr-source:
-        description: 'The repository the PR numbers belong to.'
+      repo-source:
+        description: 'Repository to stage changes from.'
         required: false
         type: choice
         default: 'upstream'
         options:
           - upstream
           - current
+      pr-target:
+        description: 'Repository to submit pull requests to.'
+        required: false
+        type: choice
+        default: 'current'
+        options:
+          - upstream
+          - current
 
 # Disable permissions for all available scopes by default.
 # Any needed permissions should be configured at the job level.
@@ -163,9 +171,9 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           STEPS_UPSTREAM_OUTPUTS_REPO: ${{ steps.upstream.outputs.repo }}
           INPUTS_PR_NUMBERS: ${{ inputs.pr_numbers }}
-          INPUTS_PR_SOURCE: ${{ inputs.pr-source }}
+          INPUTS_REPO_SOURCE: ${{ inputs.repo-source }}
         run: |
-          if [ "${INPUTS_PR_SOURCE}" = "upstream" ]; then
+          if [ "${INPUTS_REPO_SOURCE}" = "upstream" ]; then
             PR_REPO="${STEPS_UPSTREAM_OUTPUTS_REPO}"
           else
             PR_REPO="${GITHUB_REPOSITORY}"
@@ -223,10 +231,11 @@ jobs:
           MATRIX_BRANCH: ${{ matrix.branch }}
           INPUTS_COMMIT_SHA: ${{ inputs.commit-sha }}
           INPUTS_PR_NUMBERS: ${{ inputs.pr_numbers }}
-          INPUTS_PR_SOURCE: ${{ inputs.pr-source }}
+          INPUTS_REPO_SOURCE: ${{ inputs.repo-source }}
+          INPUTS_PR_TARGET: ${{ inputs.pr-target }}
           STEPS_BACKPORT_BRANCH_OUTPUTS_NAME: ${{ steps.backport-branch.outputs.name }}
         run: |
-          if [ "${INPUTS_PR_SOURCE}" = "upstream" ]; then
+          if [ "${INPUTS_REPO_SOURCE}" = "upstream" ]; then
             PR_REPO="${STEPS_UPSTREAM_OUTPUTS_REPO}"
           else
             PR_REPO="${GITHUB_REPOSITORY}"
@@ -241,10 +250,10 @@ jobs:
           if [ -n "${INPUTS_COMMIT_SHA}" ]; then
             BODY="This pull request backports \`${INPUTS_COMMIT_SHA}\` (https://github.com/${STEPS_UPSTREAM_OUTPUTS_REPO}/commit/${INPUTS_COMMIT_SHA}) to the \`${MATRIX_BRANCH}\` branch."
           else
-            BODY="Backport to the \`${MATRIX_BRANCH}\` branch."
+            BODY="Backports to the \`${MATRIX_BRANCH}\` branch."
           fi
 
-          BODY="${BODY}\n\n## Changes\n"
+          BODY="${BODY}\n\n## Changes Included\n"
 
           if [ -n "${INPUTS_COMMIT_SHA}" ]; then
             COMMIT_MESSAGE=$(git log --format=%B -n 1 "${INPUTS_COMMIT_SHA}")
@@ -260,9 +269,18 @@ jobs:
             done
           fi
 
+          if [ "${INPUTS_PR_TARGET}" = "upstream" ]; then
+            PR_REPO="${STEPS_UPSTREAM_OUTPUTS_REPO}"
+            PR_HEAD="${GITHUB_REPOSITORY_OWNER}:${STEPS_BACKPORT_BRANCH_OUTPUTS_NAME}"
+          else
+            PR_REPO="${GITHUB_REPOSITORY}"
+            PR_HEAD="${STEPS_BACKPORT_BRANCH_OUTPUTS_NAME}"
+          fi
+
           gh pr create \
+            --repo "${PR_REPO}" \
             --base "${MATRIX_BRANCH}" \
-            --head "${STEPS_BACKPORT_BRANCH_OUTPUTS_NAME}" \
+            --head "${PR_HEAD}" \
             --title "$PR_TITLE" \
             --assignee "${GITHUB_ACTOR}" \
             --body "$(echo -e "$BODY")"